Anything using the currencies as stores of wealth or mediums of exchange seem to be better suited by traditional finance which are less volatile and capable of higher volume. Anything using the ledger as a distributed datastore seems like it would be better suited by a datastore that wasn't wrapped up in a currency ledger and uses a consensus algorithm less costly than proof-of-work.
Anything using the currencies as stores of wealth or mediums of exchange seem to be better suited by traditional finance which are less volatile and capable of higher volume. Anything using the ledger as a distributed datastore seems like it would be better suited by a datastore that wasn't wrapped up in a currency ledger and uses a consensus algorithm less costly than proof-of-work.